The longitudinal stress induced in a thin walled cylindrical vessel is

• A. \(\frac{{{\text{pD}}}}{{2{\text{t}}}}\)
• B. \(\frac{{{\text{pD}}}}{{{\text{t}}}}\)
• C. \(\frac{{{\text{pD}}}}{{4{\text{t}}}}\)
• D. \(\frac{{{\text{pD}}}}{{3{\text{t}}}}\)